<?php
/**
 * 程序版本：JB_Version1.0
 *
 * 开发日期：2015-9-11
 *
 * 开发版权：© 蜗牛兄弟网络科技有限公司
 *
 * 版权申明：此程序仅供成都金标装饰有限公司使用，不得转让和出售，一经发现，将追究其责任
 *
 * 开发申明：蜗牛兄弟 你 不是一个人在战斗。
 *
 *                           商场如战场，枪林弹雨中，双拳终将难敌四手。天时地利终须人和。
 *
 *                           我们是蜗牛兄弟，你成功路上的最佳推手。成功一直在你身边，只需您珍重把握。
 *
 *                           你， 不是一个人在战斗！
 *
 * 程序说明：分页类控制
 */
/**
 * 分页类
 * 
 * @author xiaojiong & 290747680@qq.com
 *         @date 2011-08-17
 *        
 *         show(2) 1 ... 62 63 64 65 66 67 68 ... 150
 *         分页样式
 *         #page{font:12px/16px arial}
 *         #page span{float:left;margin:0px 3px;}
 *         #page a{float:left;margin:0 3px;border:1px solid #ddd;padding:3px
 *         7px; text-decoration:none;color:#666}
 *         #page a.now_page,#page a:hover{color:#fff;background:#05c}
 */

class LibPage {
	public $first_row; // 起始行数
	
	public $list_rows; // 列表每页显示行数
	
	protected $total_pages; // 总页数
	
	protected $total_rows; // 总行数
	
	protected $now_page; // 当前页数
	
	protected $method = 'defalut'; // 处理情况 Ajax分页 Html分页(静态化时) 普通get方式
	
	protected $parameter = '';
	
	protected $page_name; // 分页参数的名称
	
	protected $ajax_func_name;
	
	public $plus = 3; // 分页偏移量
	
	protected $url;
	
	/**
	 * 构造函数
	 * 
	 * @param unknown_type $data        	
	 */
	public function __construct($data = array()) {
		$this->total_rows = $data ['total_rows'];
		
		$this->parameter = ! empty ( $data ['parameter'] ) ? $data ['parameter'] : '';
		$this->list_rows = ! empty ( $data ['list_rows'] ) && $data ['list_rows'] <= 100 ? $data ['list_rows'] : 15;
		$this->total_pages = ceil ( $this->total_rows / $this->list_rows );
		$this->page_name = ! empty ( $data ['page_name'] ) ? $data ['page_name'] : 'p';
		$this->ajax_func_name = ! empty ( $data ['ajax_func_name'] ) ? $data ['ajax_func_name'] : '';
		
		$this->method = ! empty ( $data ['method'] ) ? $data ['method'] : '';
		
		/* 当前页面 */
		if (! empty ( $data ['now_page'] )) {
			$this->now_page = intval ( $data ['now_page'] );
		} else {
			$this->now_page = ! empty ( $_GET [$this->page_name] ) ? intval ( $_GET [$this->page_name] ) : 1;
		}
		$this->now_page = $this->now_page <= 0 ? 1 : $this->now_page;
		
		if (! empty ( $this->total_pages ) && $this->now_page > $this->total_pages) {
			$this->now_page = $this->total_pages;
		}
		$this->first_row = $this->list_rows * ($this->now_page - 1);
	}
	
	/**
	 * 得到当前连接
	 * 
	 * @param
	 *        	$page
	 * @param
	 *        	$text
	 * @return string
	 */
	protected function _get_link($page, $text) {
		switch ($this->method) {
			case 'ajax' :
				$parameter = '';
				if ($this->parameter) {
					$parameter = ',' . $this->parameter;
				}
				return '<a onclick="' . $this->ajax_func_name . '(\'' . $page . '\'' . $parameter . ')" href="javascript:void(0)">' . $text . '</a>' . "\n";
				break;
			
			case 'html' :
				$url = str_replace ( '?', $page, $this->parameter );
				return '<a href="' . $url . '">' . $text . '</a>' . "\n";
				break;
			
			default :
				return '<a href="' . $this->_get_url ( $page ) . '">' . $text . '</a>' . "\n";
				break;
		}
	}
	
	/**
	 * 设置当前页面链接
	 */
	protected function _set_url() {
		$url = $_SERVER ['REQUEST_URI'] . (strpos ( $_SERVER ['REQUEST_URI'], '?' ) ? '' : "?") . $this->parameter;
		$parse = parse_url ( $url );
		if (isset ( $parse ['query'] )) {
			parse_str ( $parse ['query'], $params );
			unset ( $params [$this->page_name] );
			$url = $parse ['path'] . '?' . http_build_query ( $params );
		}
		if (! empty ( $params )) {
			$url .= '&';
		}
		$this->url = $url;
	}
	
	/**
	 * 得到$page的url
	 * 
	 * @param $page 页面        	
	 * @return string
	 */
	protected function _get_url($page) {
		if ($this->url === NULL) {
			$this->_set_url ();
		}
		// $lable = strpos('&', $this->url) === FALSE ? '' : '&';
		return $this->url . $this->page_name . '=' . $page;
	}
	
	/**
	 * 得到第一页
	 * 
	 * @return string
	 */
	public function first_page($name = '第一页') {
		if ($this->now_page > 5) {
			return $this->_get_link ( '1', $name );
		}
		return '';
	}
	
	/**
	 * 最后一页
	 * 
	 * @param
	 *        	$name
	 * @return string
	 */
	public function last_page($name = '最后一页') {
		if ($this->now_page < $this->total_pages - 5) {
			return $this->_get_link ( $this->total_pages, $name );
		}
		return '';
	}
	
	/**
	 * 上一页
	 * 
	 * @return string
	 */
	public function up_page($name = '上一页') {
		if ($this->now_page != 1) {
			return $this->_get_link ( $this->now_page - 1, $name );
		}
		return '';
	}
	
	/**
	 * 下一页
	 * 
	 * @return string
	 */
	public function down_page($name = '下一页') {
		if ($this->now_page < $this->total_pages) {
			return $this->_get_link ( $this->now_page + 1, $name );
		}
		return '';
	}
	
	/**
	 * 分页样式输出
	 * 
	 * @param
	 *        	$param
	 * @return string
	 */
	public function show($param = 1) {
		if ($this->total_rows < 1) {
			return '';
		}
		
		$className = 'show_' . $param;
		
		$classNames = get_class_methods ( $this );
		
		if (in_array ( $className, $classNames )) {
			return $this->$className ();
		}
		return '';
	}
	
	protected function show_2() {
		if ($this->total_pages != 1) {
			$return = '';
			$return .= $this->up_page ( '<' );
			for($i = 1; $i <= $this->total_pages; $i ++) {
				if ($i == $this->now_page) {
					$return .= "<a class='now_page'>$i</a>\n";
				} else {
					if ($this->now_page - $i >= 4 && $i != 1) {
						$return .= "<span class='pageMore'>...</span>\n";
						$i = $this->now_page - 3;
					} else {
						if ($i >= $this->now_page + 5 && $i != $this->total_pages) {
							$return .= "<span>...</span>\n";
							$i = $this->total_pages;
						}
						$return .= $this->_get_link ( $i, $i ) . "\n";
					}
				}
			}
			$return .= $this->down_page ( '>' );
			return $return;
		}
	}
	
	protected function show_1() {
		$plus = $this->plus;
		if ($plus + $this->now_page > $this->total_pages) {
			$begin = $this->total_pages - $plus * 2;
		} else {
			$begin = $this->now_page - $plus;
		}
		
		$begin = ($begin >= 1) ? $begin : 1;
		$return = '';
		$return .= $this->first_page ();
		$return .= $this->up_page ();
		for($i = $begin; $i <= $begin + $plus * 2; $i ++) {
			if ($i > $this->total_pages) {
				break;
			}
			if ($i == $this->now_page) {
				$return .= "<a class='now_page'>$i</a>\n";
			} else {
				$return .= $this->_get_link ( $i, $i ) . "\n";
			}
		}
		$return .= $this->down_page ();
		$return .= $this->last_page ();
		return $return;
	}
	
	protected function show_3() {
		$plus = $this->plus;
		if ($plus + $this->now_page > $this->total_pages) {
			$begin = $this->total_pages - $plus * 2;
		} else {
			$begin = $this->now_page - $plus;
		}
		$begin = ($begin >= 1) ? $begin : 1;
		$return = '总计 ' . $this->total_rows . ' 个记录分为 ' . $this->total_pages . ' 页, 当前第 ' . $this->now_page . ' 页 ';
		$return .= ',每页 ';
		$return .= '<input type="text" value="' . $this->list_rows . '" id="pageSize" size="3"> ';
		$return .= $this->first_page () . "\n";
		$return .= $this->up_page () . "\n";
		$return .= $this->down_page () . "\n";
		$return .= $this->last_page () . "\n";
		$return .= '<select onchange="' . $this->ajax_func_name . '(this.value)" id="gotoPage">';
		
		for($i = $begin; $i <= $begin + 10; $i ++) {
			if ($i > $this->total_pages) {
				break;
			}
			if ($i == $this->now_page) {
				$return .= '<option selected="true" value="' . $i . '">' . $i . '</option>';
			} else {
				$return .= '<option value="' . $i . '">' . $i . '</option>';
			}
		}
		$return .= '</select>';
		return $return;
	}
}
/**
 * 使用方法
 *
 *###处理html静态化页面分页的情况###
# method 处理环境 设置为 html 
# parameter 为静态页面参数  xxx.com/20-0-0-0-40-?.html 注意问号
# ?问号的位置会自动替换为去向页码 
# now_page 当前页面(静态页面获取不到当前页面所以只有你传入)
$params = array(
            'total_rows'=>100, #(必须)
            'method'    =>'html', #(必须)
            'parameter' =>'xxx.com/20-0-0-0-40-?.html',  #(必须)
            'now_page'  =>$_GET['p'],  #(必须)
            'list_rows' =>10, #(可选) 默认为15
);
$page = new Core_Lib_Page($params);
echo  $page->show(1);
#<a href="xxx.com/20-0-0-0-40-2.html">2</a>
 
 
###处理ajax分页的情况###
# method 处理环境 设置为 ajax
# ajax_func_name ajax分页跳转页面的javascript方法
# parameter    ajax_func_name后面的附带参数 默认为空
# now_page 不到当前页面所以只有你传入
$params = array(
            'total_rows'=>100,
            'method'    =>'ajax',
            'ajax_func_name' =>'goToPage',
            'now_page'  =>1,
            #'parameter' =>"'jiong','username'",
);
$page = new Core_Lib_Page($params);
echo  $page->show(1);        
#<a href="javascript:void(0)" onclick="goToPage('7')">7</a>
#添加了parameter<a href="javascript:void(0)" onclick="goToPage('6','jiong','username')">
 */
	